php Encryption not work in 5.6 or later version? - php

I am using this code to encrypt password but it doesn't work php 5.6 or later versions. Please suggest me new code without changing algo.
please give me new code without changing algorithm.
<?php
class Encryption {
var $skey = "844958uyjd875e89t5f4h6j4h5g"; // you can change it
public function safe_b64encode($string) {
$data = base64_encode($string);
$data = str_replace(array('+','/','='),array('-','_',''),$data);
return $data;
}
public function safe_b64decode($string) {
$data = str_replace(array('-','_'),array('+','/'),$string);
$mod4 = strlen($data) % 4;
if ($mod4) {
$data .= substr('====', $mod4);
}
return base64_decode($data);
}
public function encode($value){
if(!$value){return false;}
$text = $value;
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $this->skey, $text, MCRYPT_MODE_ECB, $iv);
return trim($this->safe_b64encode($crypttext));
}
public function decode($value){
if(!$value){return false;}
$crypttext = $this->safe_b64decode($value);
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$decrypttext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $this->skey, $crypttext, MCRYPT_MODE_ECB, $iv);
return trim($decrypttext);
}
}
?>

Just use password_hash and password_verify. It's the safest way to protect passwords.
For example:
$password_hash = password_hash("yourpassword", PASSWORD_DEFAULT);
if (password_verify('yourpassword', $password_hash)) {
echo 'Password is valid!';
} else {
echo 'Invalid password.';
}
http://php.net/manual/en/function.password-hash.php

Related

PHP convert MCRYPT_ENCRYPT to OPENSSL_ENCRYPT (SOAP header)

I need to encrypt some SOAP header fields, and I currently have the following code working in a project with PHP 5.6 version.
function getBaseEncoded($data, $key)
{
$size = $this->pkcs5_pad($data, mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB));
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB), MCRYPT_RAND);
$result = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $size, MCRYPT_MODE_ECB, $iv);
return trim(base64_encode($result));
}
private function pkcs5_pad($text, $blocksize)
{
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat (chr($pad), $pad);
}
What happens is that now I have in my hands a similiar project but with PHP 7, and the function MCRYPT is deprecated and I need to switch it to OPENSSL_ENCRYPT.
The code below is my first attempt:
function getBaseEncoded($data, $key)
{
$result = openssl_encrypt($data, 'AES-128-ECB', $key, OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING);
return trim(base64_encode($result));
}
But I'm now receiving a SOAP error with the message
SoapFault => Could not connect to host
and it got me thinking if the problem is on my new function?
You are missing some initializator vector data.
$ivsize = openssl_cipher_iv_length('AES-128-ECB');
$iv = openssl_random_pseudo_bytes($ivsize);
$ciphertext = openssl_encrypt(
$data,
'AES-128-ECB',
$key,
OPENSSL_RAW_DATA | OPENSSL_ZERO_PADDING,
$iv
);
echo encrypt_openssl($data, $key);
function encrypt_openssl($msg, $key, $iv = null) {
$iv_size = openssl_cipher_iv_length('AES-128-ECB');
if (!$iv) {
$iv = openssl_random_pseudo_bytes($iv_size);
}
$encryptedMessage = openssl_encrypt($msg, 'AES-128-ECB', $key, OPENSSL_RAW_DATA, $iv);
return base64_encode($iv . $encryptedMessage);
}

Decrypted string is sometimes not same as encrypted source

class Auth extends MySQLi {
public function aes_enc($encrypt, $mc_key, $iv) {
$passcrypt = trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, substr($mc_key, 0, 32), trim($encrypt), MCRYPT_MODE_CBC, $iv));
return $passcrypt;
}
public function aes_dec($decrypt, $mc_key, $iv) {
$decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, substr($mc_key, 0, 32), trim($decrypt), MCRYPT_MODE_CBC, $iv));
return $decrypted;
}
public function salt() {
return str_shuffle('abcdefghijklmnoprsquvzyx0123456789-.,;:_<>');
}
public function iv() {
return mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND);
}
}
And on test.php, following code:
<?
require('Auth.php');
$Auth = new Auth;
$str = "verygudlongpassword";
for ($i = 0; $i < 1000; $i++) {
$salt = sha1($Auth->salt());
$iv = $Auth->iv();
$enc = $Auth->aes_enc($str, $salt, $iv);
$dec = $Auth->aes_dec($enc, $salt, $iv);
if ($str != $dec) {
echo $salt . "<br>\n";
}
}
?>
Sometimes, $dec != $str. Why is this happening? I am not even saving anything into DB atm, so it's not that.
Thanks for help.
i dont really have anything more to say, but site isnt letting me post. (nvm that part)
After reviewing your code and playing with it locally. It would appear that your decryption leaves some whitespace on the decrypted text. I removed the trim() function from all locations except the return value from aes_dec() and the code now encrypts/decrypts your string successfully 1000 times.
So it would seem trimming was the problem and the solution.
class Auth extends MySQLi {
public function aes_enc($encrypt, $mc_key, $iv)
{
$passcrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, substr($mc_key, 0, 32), $encrypt, MCRYPT_MODE_CBC, $iv);
return $passcrypt;
}
public function aes_dec($decrypt, $mc_key, $iv)
{
$decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, substr($mc_key, 0, 32), $decrypt, MCRYPT_MODE_CBC, $iv));
return $decrypted;
}
public function salt()
{
return str_shuffle('abcdefghijklmnoprsquvzyx0123456789-.,;:_<>');
}
public function iv()
{
return mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND);
}
}
$Auth = new Auth;
$str = "verygudlongpassword";
for ($i = 0; $i < 1000; $i++) {
$salt = sha1($Auth->salt());
$iv = $Auth->iv();
$enc = $Auth->aes_enc($str, $salt, $iv);
$dec = $Auth->aes_dec($enc, $salt, $iv);
if ($str != $dec) {
echo "Decryption failed!<br>\n";
} else {
echo "Decryption success! String: $dec<br>\n";
}
}

Encryption - Decryption, Database

i created two functions for encryption and decryption like this
function encryption($x) {
$key = 'SuperSecretKey';
$encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $x, MCRYPT_MODE_ECB);
return $encrypted;
}
function decryption($y) {
$key = 'SuperSecretKey';
$decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $y, MCRYPT_MODE_ECB);
return $decrypted;
}
i inserted the encrypted password in databbase its working fine , when i retrieve the password from database i get the encrypted password like this
$dpass = "select Password from persons where Email='" . $_POST['name'] . "'";
$rpass = mysql_query($dpass);
$line = mysql_fetch_array($rpass);
$lpass = $line['Password'];
echo $lpass;
But the problem is when U use the decryption func
$d_pass = decryption($lpass);
echo $d_pass;
It dont give me the same text I used for password? Can you tell me what the problem is?
Try this
function encryption($x) {
$key = 'SuperSecretKey';
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $x, MCRYPT_MODE_CBC, md5(md5($key))));
return $encrypted;
}
function decryption($y) {
$key = 'SuperSecretKey';
$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($y), MCRYPT_MODE_CBC, md5(md5($key))), "\0");
return $decrypted;
}

PHP encryption / decryption adding padded characters

I'm trying to create a simple Encryption class but the resulting string is being padded with non-ascii characters. I've tried rtrim(), converting to utf8, etc. as mentioned in some other answers. What exactly am I missing? Here is what the characters show up when pasting the results into Notepad++
Pastebin containing the characters here. Appears as 't' in html, but copying that into notepad shows the random bits of data after it.
class Crypter implements ICrypter {
private $Key;
private $Algo;
public function __construct($Algo = MCRYPT_BLOWFISH) {
$this->Key = substr('key', 0, mcrypt_get_key_size($Algo, MCRYPT_MODE_ECB));
$this->Algo = $Algo;
}
public function Encrypt($data) {
//$iv_size = mcrypt_get_iv_size($this->Algo, MCRYPT_MODE_ECB);
//$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$blocksize = mcrypt_get_block_size('blowfish', 'ecb'); // get block size
$pkcs = $blocksize - (strlen($data) % $blocksize); // get pkcs5 pad length
$data.= str_repeat(chr($pkcs), $pkcs); // append pkcs5 padding to the data
$crypt = mcrypt_encrypt($this->Algo, $this->Key, $data, MCRYPT_MODE_ECB);
return rtrim(base64_encode($crypt));
}
public function Decrypt($data) {
$crypt = base64_decode($data);
$iv_size = mcrypt_get_iv_size($this->Algo, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$decrypt = mcrypt_decrypt($this->Algo, $this->Key, $crypt, MCRYPT_MODE_ECB, $iv);
return rtrim($decrypt);
}
}
You need to handle the padding in the decryption same as the encryption. Here is a working example of your code:
<?php
class Crypter{
private $Key;
private $Algo;
public function __construct($Algo = MCRYPT_BLOWFISH) {
$this->Key = substr('key', 0, mcrypt_get_key_size($Algo, MCRYPT_MODE_ECB));
$this->Algo = $Algo;
}
public function Encrypt($data) {
//$iv_size = mcrypt_get_iv_size($this->Algo, MCRYPT_MODE_ECB);
//$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$blocksize = mcrypt_get_block_size('blowfish', 'ecb'); // get block size
$pkcs = $blocksize - (strlen($data) % $blocksize); // get pkcs5 pad length
$data.= str_repeat(chr($pkcs), $pkcs); // append pkcs5 padding to the data
$crypt = mcrypt_encrypt($this->Algo, $this->Key, $data, MCRYPT_MODE_ECB);
return rtrim(base64_encode($crypt));
}
public function Decrypt($data) {
$crypt = base64_decode($data);
$iv_size = mcrypt_get_iv_size($this->Algo, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$decrypt = mcrypt_decrypt($this->Algo, $this->Key, $crypt, MCRYPT_MODE_ECB, $iv);
$block = mcrypt_get_block_size('blowfish', 'ecb');
$pad = ord($decrypt[($len = strlen($decrypt)) - 1]);
return substr($decrypt, 0, strlen($decrypt) - $pad);
}
}
$crypter = new Crypter();
$data = "Some data to encrypt";
$encryptedData = $crypter->Encrypt($data);
$decryptedData = $crypter->Decrypt($encryptedData);
echo "Decrypted Data = [$decryptedData]\n";
Notice the three lines I replaced your original Decrypt() return line with.

Encrypting strings in PHP

Currently im using
$key="pass";
$val="secret";
$encp=mcrypt_encrypt(MCRYPT_DES, $key, $val, MCRYPT_MODE_ECB);
But when i call printf($encp)
No value is displayed,im using PHP version 5.2.17
Is there a better way to do it.Please help.
EDIT:
<?PHP
define('SECURE_KEY','Somekey');
function encrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv);
}
function decrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv));
}
$temp=encrypt("teststring");
printf($temp);
?>
Update (27/09/17):
Since mcrypt_encrypt is DEPRECATED as of PHP 7.1.0. Ive added a simple encrypt/decrypt using openssl.
function encrypt($string, $key = 'PrivateKey', $secret = 'SecretKey', $method = 'AES-256-CBC') {
// hash
$key = hash('sha256', $key);
// create iv - encrypt method AES-256-CBC expects 16 bytes
$iv = substr(hash('sha256', $secret), 0, 16);
// encrypt
$output = openssl_encrypt($string, $method, $key, 0, $iv);
// encode
return base64_encode($output);
}
function decrypt($string, $key = 'PrivateKey', $secret = 'SecretKey', $method = 'AES-256-CBC') {
// hash
$key = hash('sha256', $key);
// create iv - encrypt method AES-256-CBC expects 16 bytes
$iv = substr(hash('sha256', $secret), 0, 16);
// decode
$string = base64_decode($string);
// decrypt
return openssl_decrypt($string, $method, $key, 0, $iv);
}
$str = 'Encrypt this text';
echo "Plain: " .$str. "\n";
// encrypt
$encrypted_str = encrypt($str);
echo "Encrypted: " .$encrypted_str. "\n";
// decrypt
$decrypted_str = decrypt($encrypted_str);
echo "Decrypted: " .$decrypted_str. "\n";
Try these: (PHP < 7.1.0) If your using > PHP 7.1.0 see above.
define('SECURE_KEY','Somekey');//Assigned within a config, pref outside of root dir
function encrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return mcrypt_encrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv);
}
function decrypt($value){
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, SECURE_KEY, $value, MCRYPT_MODE_ECB, $iv));
}
//Simple usage
$encryptedString = encrypt('This String Will Be encrypted');
echo decrypt($encryptedString);
Edited from source - http://php.net/manual/en/function.mcrypt-encrypt.php
Try these PHP functions convert_uuencode and convert_uudecode:
function encrypt_decrypt ($data, $encrypt) {
if ($encrypt == true) {
$output = base64_encode (convert_uuencode ($data));
} else {
$output = convert_uudecode (base64_decode ($data));
}
return $output;
}
$enc_txt = encrypt_decrypt ("PASSWORD TEXT", true);
echo $enc_txt."\n";
// LTQkJTM0VT0vNEQwQDUkNTg1YGBgCmAK
echo encrypt_decrypt ($enc_txt, false);
// PASSWORD TEXT
This is much simpler and does not depend on libraries installed in PHP

Categories